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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

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About the <head>

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <!-- image from here: https://s-media-cache-ak0.pinimg.com/736x/8d/fd/8d/8dfd8db5b0ff315865216a5099d324a2.jpg -->
<svg
   xmlns="http://www.w3.org/2000/svg"
   width="172.33589mm"
   height="117.20642mm"
   viewBox="0 0 610.63899 415.29836">
  <g transform="translate(-53.319796,-359.27403)"><path
        d="M 661.66039,747.46363 C 662.0677,686.27242 663.31602,623.78269 644.23378,564.88768 622.15502,508.4414 587.82981,455.80534 541.22286,417.03697 512.86875,403.3452 484.74625,386.31879 452.1975,386.36185 c -28.11599,-1.42388 -56.19205,1.76169 -84.26958,-1.33307 -47.21975,-6.25091 -71.82241,-10.02693 -81.16323,-15.51913 -26.41529,-15.19579 -56.88032,-6.97955 -64.81893,7.62928 0,0 -26.89494,26.17423 -45.90301,40.00801 -18.39168,9.26098 -35.89311,21.17625 -54.84035,28.78083 -28.229191,6.15886 -52.024261,30.4732 -55.180521,59.13001 -1.62041,35.58847 13.76948,48.18234 4.51297,66.92559 l -15.01088,34.46975 c 25.9396,18.18518 48.632601,26.49146 67.129111,22.02844 0,0 35.84323,-12.72065 39.17338,-26.15086 25.64628,-5.57813 47.39992,-13.67867 68.23782,-30.89125 9.25296,12.51037 13.14882,51.26898 27.62399,78.02832 13.00789,27.13934 18.53938,33.95544 34.76198,73.96482 -16.57236,8.27768 -50.70545,14.40175 -53.29562,29.81139 4.57023,3.1371 58.52526,10.88255 86.01215,-0.76232 28.67424,0.74644 26.46185,-37.17866 33.24362,-57.94491 5.09775,-32.86269 15.69265,-39.22087 12.03532,-72.41671 l -8.89196,-58.89431 9.87192,64.08275 c 37.40631,17.13231 80.66387,30.80831 120.86754,14.98955 21.07488,-1.52718 -2.32446,-9.96217 -8.34877,-15.73147 -1.45984,-0.68851 13.36034,9.79815 18.2595,13.47469 l 42.96768,31.32411 c 3.82223,31.57721 34.80824,46.1426 52.15185,69.01805 -13.95099,6.41336 -42.27956,7.96575 -36.35676,21.09832 -0.49592,13.35162 33.10512,11.33258 65.15472,10.01292 11.84632,-2.99797 23.69263,0.30268 35.53895,-24.03102 z" stroke="#000" stroke-width="3" fill="none" />
    <path
       d="m 128.00977,626.46125 c 0,0 -23.07857,33.8817 -27.39849,59.47377 -10.949181,18.58658 -39.752841,54.15434 -26.525941,55.22564 16.28786,6.44534 26.991301,-4.57443 43.279151,-28.32084 l 15.35712,-14.16042 c 65.2595,-10.60173 82.13895,-49.95579 112.82245,-81.59942" stroke="#000" stroke-width="2" fill="none"/>
    <path
       d="m 388.81898,635.13451 c -9.92765,22.49952 -13.58251,54.0165 -16.22968,83.90049 -10.42741,0.55994 -14.22055,0.41753 -20.94151,8.49626 -0.50548,4.89976 -6.23393,10.86335 -0.69806,16.63849 9.22832,6.87459 19.22215,6.91687 34.55352,9.91229 17.48664,3.92999 29.1915,1.99563 40.83596,-0.70802 6.8637,-6.26721 9.28395,-17.38653 6.28246,-23.71871 63.48885,-59.72264 45.20176,-67.16494 71.02667,-88.32562" stroke="#000" stroke-width="2" fill="none"/>
    <path
      d="m 78.186389,473.97123 c -5.41217,-9.67049 -4.53435,-21.06522 -0.69804,-29.82538 6.86537,-6.46218 17.61198,-4.31917 19.02187,-0.17701 0,0 1.47186,7.25663 0.52355,12.03635" stroke="#000" stroke-width="2" fill="none"/>
    <path
        d="m 133.51221,484.62424 c -1.71696,-5.82731 -3.68172,-11.41525 8.88473,-31.04009 6.34445,-7.96929 13.62981,-11.83211 21.47144,-13.26713 6.79783,2.34152 12.0199,8.33648 15.0547,16.77166 0.43723,1.47507 1.4456,10.10125 4.19557,12.01551 8.48413,11.24904 1.62669,19.71794 -4.19557,24.53168" stroke="#000" stroke-width="2" fill="none"/></g>
</svg>
!

CSS 

              
                body {
  background: #ADD8E6;
  color: white;
}

svg {
  position: fixed;
  margin: auto;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 50%;
  max-width: 1000px;
  max-height: 1000px;
  color
}

.pointer {
  cursor: pointer;
}
!

JS 

              
                var drawBear = function() {
  var paths = document.querySelectorAll('path');
  for (var i = 0; i < paths.length; i++) {
    var path = paths[i];
    var length = path.getTotalLength();
    // Clear any previous transition
    path.style.transition = path.style.WebkitTransition =
      'none';
    // Set up the starting positions
    path.style.strokeDasharray = length + ' ' + length;
    path.style.strokeDashoffset = length;
    // Trigger a layout so styles are calculated & the browser
    // picks up the starting position before animating
    path.getBoundingClientRect();
    // Define our transition
    path.style.transition = path.style.WebkitTransition =
      'stroke-dashoffset 6s ease-in-out';
    // Go!
    path.style.strokeDashoffset = '0';
  }
}

drawBear();
/* From Modernizr */
function whichTransitionEvent() {
  var t;
  var el = document.createElement('fakeelement');
  var transitions = {
    'transition': 'transitionend',
    'OTransition': 'oTransitionEnd',
    'MozTransition': 'transitionend',
    'WebkitTransition': 'webkitTransitionEnd'
  }

  for (t in transitions) {
    if (el.style[t] !== undefined) {
      return transitions[t];
    }
  }
}
/* Listen for a transition! */
var transitionEvent = whichTransitionEvent();
var transitionDone = false;
transitionEvent && document.body.addEventListener(transitionEvent, function() {
    transitionDone = true;
    document.body.className = "pointer";
});

document.body.onclick = function() {
  if (transitionDone) {
    drawBear();
    transitionDone = false;
    document.body.className = "";

  }
};
!
999px

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